Coway
Coway Airmega ProX
A
Ranked #7 in Air Purifiers
Backed by 3 cited sources
Covered by 2 outlets
The best large-space purifier tested by HouseFresh: 462 CFM PM1 CADR at a quiet 53.6 dBA, and it outperformed the $1,400 IQAir Atem X while costing ~$800. Expensive in absolute terms, but the strongest performance-per-dollar at the top of the market.
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Key features
- ✓ Estimated PM1 CADR 462 CFM
- ✓ 5 air changes/hour up to 693 sq ft
- ✓ Dual filtration, quiet 53.6 dBA at max
- ✓ Beat the $1,400 IQAir Atem X in testing
- ✓ ~$800 list
The sources behind this ranking
3 cited sources cover Coway Airmega ProX. Here's the stance each one takes.
S 2 B 1
H 
HouseFresh Top of the leaderboard for large residential purifiers; outperformed the IQAir Atem X. S Read → H HouseFresh Named best for large spaces in the 2026 buying guide. S Read → T 
Tom's Guide "Performs better than it looks" and "worth a look" for raw power, but pricey with costly filters and no app control. B Read →